"I think a lot of people will be surprised by how quickly we can get to Mars."

"I think that we're going to see a lot of really amazing things happen in the next 20 years."

"My goal is to make humanity a multi-planetary species."

"I'm not a fan of people who are negative. I think it's important to be positive and optimistic."

"The more rockets we launch, the more likely it is that we'll have a self-sustaining civilization on Mars."